ORIENTED FILMS COMPRISING ETHYLENE/?-OLEFIN BLOCK INTERPOLYMER

摘要

The present invention relates to oriented films having improved shrinkage force, shrinkage temperature, tear strength, seal strength and/or bubble stability. For example, the shrink tension of the oriented film stretched at 1100C is less than 3 MPa. The oriented film comprises a polymer composition comprising at least one ethylene/a- olefin interpolymer, wherein the ethylene/a-olefm interpolymer may have, for example, a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship: Tm > -6553.3 + 13735(d) - 7051.7(d)2.